Attachment for adding machines



c. A. TINDALL AND J. R. SHOWERS.

ATTACHMENT F.0R ADDING MACHINES.

APPLICATION FILED mus. 1921.

Patented Nov. 21, 1922.

Patented Nov. 21, 1922.

UNITED STATES PATENT OFFICE.

cam. A.

TINDALL ASSIGNOB TO SAID SHOWERS.

ATTACHMENT FOR ADDING MACHINES.

Application filed m 5, 1921. Serial No. 482,425.

To all whom it may concern: Be it known that we, CARL A. TINDALL and Josarn R. Snownns, citizens of the United States, residing at Shelbyville, county of Shelby, State of Indiana, United States of America, new and useful Improvements in Attach- 'ments for Adding Machines; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the ac companying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to attachments for recording machines and to attachments for machines in which a printed record is made on a continuous strip of paper travelling over a rotating platen stepped by hand or otherwise and more particularly to adding machines. Adding machines as now made carry a roll or spool on which is wound a strip of paper, the end of which strip of paper passes around the platen and is torn off after the record has been completed. I

There are also machines of the typewriter type in which a strip of paper is drawn from a stockroll by the platen and the paper leaving the platen is rewound on a rewindingroll driven from the platen.

Such machines have their mechanism for rewinding the paper strip forming an integral part thereof, but this invention has for its object an attachment primarily for use on an adding machine which is usually pro vided with a pair of arms in which the paper roll is supported. Our attachment comprises a pair of sheet metal frame members arranged to be attached to the usual paper roll supporting arms -of the adding machine. The roll of such machine is removed and placed in the frame members with an-additional wind up roll also supported in said members and driven by a belt from the platen. Details of the construction will hereinafter be more fully explained in the following description in connection with drawings on which like parts are similarly desi ated and where Flgure l is a perspective of the attachment with so much of an adding machine have invented certain as is necessary for an understanding of the invention.

Fig. 2 is a front elevation thereof on a larger scale.

3 is a side view, and

F 1g 4 is a perspective of a detail of construction. The adding machine is usually provided with a pair of arms a or brackets between WhlCll the roll is mounted on a removable shaft as 14. The stock roll shaft is removed and the attachment is connected to these arms a.

The attachment comprises a pair of shee metal frame members I), each having an arm 5 provided with a pair of lugs 6 that embrace the sides of one of the arms a on the adding machine, a long arm 7 that-carries the shaft for the stock roll and a short arm 8 that carries the rewind roll. A fastening passes through an opening 9, Fig. 4, registering with the opening customarily present in the arms a of the adding machine, in

which the shaft of the stock roll is mounted. In the machine in question the opening in one of the arms a is usually threaded for the reception of the threaded end of the shaft on which the roll of paper stock is mounted and for this particular arm it is convenient to provide a screw 10 as the fastening for the frame member. In the other arm, which has an unthreaded opening. it is convenient to provide a screw 11 having a nut 12 on its end. The screws 9 and 11 in conjunction with the lugs 6 hold the frame members 7 securely in place. The longer arm 7 is provided with a threaded opening 13 for the reception of the threaded end of the stock roll shaft 14 customarily forming part of the adding machine and which has been removed from the upper ends of the arms a andplaced in the position shown in Fig. 2 in the ends of arms 7. In the arms 8 of the frame members b is mounted a rewind shaft 15, free to rotate therein. The shaft is provided with a collar 16 permanently fixed to the shaft, said collar having a friction flange or disc 17. The shaft 15 is then passed through the right ber 19, is then slipped onto the shaft 15. Fastening member 20 cooperating with TINDALL AND JOSEPH RALPH SHOWERS, OF SKELBYVILLE, INDIANA; SAID member 17 is also slipped on the shaft and the shaft is then passed through the arm 7 of the other member I). The spool 18 is then slipped to the right against the right hand member 6 and the fastening member 20 secured to the shaft 15 by a set screw 21. The rewind spool 18 is provided on its shaft with a loose sheet metal cylindrical piece 22, extending almost completely around the shaft of the spool and frictionally held thereto. This sheet metal piece serves as a clip or fastener for the free end of the paper strip when beginning to rewind.

On the shaft 15 is provided a loose, grooved pulley 23, whose face frictionally engages the flange 17 and is urged toward said flange by a coil spring 24, surrounding shaft 15. One end of this spring abuts against the hub 25 of the pulley 23 and the other end against the hub 26 of a hand wheel 27 secured on one end of the shaft 15 by a Set screw 28.

The shaft of the platen of the adding machine is provided with a pulley 29 and this pulley is connected by a belt, preferably of rubber, 30, to the pulley 23 on shaft 15.

In operation the stock roll shaft 14 is removed and the roll of paper 8 is placed there on. The end of the paper strip is passed under the platen around the same and up to the rewind roll, 18, where it is pushed under the clip 22. Upon operation of the platen either by manipulating the usual printing lever 1, or by using the hand wheel h of the adding machine platen similar movements will be imparted to the rewind roll by means of a belt 30. It will be noted that the pulley 29 is somewhat larger than the pulley 23 so as to cause the rewind roll 18 to tend to over wind, this provision being desirable to compensate for the varying diameter of the paper rolled on the rewind roll 18. However the tension of the paper between the platen and the rewind roll is suflicient to cause the pulley 23 to slip on the face of flange 17 said pulley and flange constituting a spring urged friction clutch for driving the rewind roll 18.

The arms 7 and 8 are approximately in alinement and when secured to the adding machine are inclined as shown so as to hold the rewind roll 18 above and in front of the stock roll 10. By this arrangement the 010- erator of the adding machine will always have quite a stretch of printed record strip in front of him.

It is of course obvious that the particular shape of the attachment members 5 their means for fastening them to the adding machine arms and other details of construction may be varied in accordance with the scope of the annexed claims.

The'roll 8 may be composed of two strips of paper that are simultaneously fed around the platen. The uppermost sheet i. e. the sheet that is printed upon is carbon coated on the under side. This sheet may be torn off and given to the customer while the under sheet is wound upon roll. 18 as a record for the store keeper.

We claim 1. An attachment for adding machines and the like comprising two metallic frame members, each having a pair of arms, and means for fastening said arms to the paper roll supporting arms of an adding machine or the like, a stock roll mounted between similar arms of said members and a rewind roll mounted between other similar arms of said members, and mechanism for frictionally operating said rewind roll fromthe platen of said machine.

2. In an attachment for adding machines, a pair of frame members each having three arms one of which has embracing lugs and a fastening, a paper stock roll between said members, a rewind roll shaft secured above and in front of said roll, a rewind roll secured to said shaft, a friction clutch device on said shaft and means for rotating the loose member of said clutch from the platen of an adding machine.

3. In an attachment for adding machines, a pair of members for attachment to the stock roll bracket armsof an adding machine, a shaft rotatably mounted between said members, a rewind roll detachably secured to said shaft, a friction disc secured to said shaft, a pulley on the shaft frictionally engaging said disc, a hand wheel on said shaft and a coil spring on said shaft between said pulley and hand wheel.

In testimony that we claim the foregoing as our invention, we have signed our names.

CARL A. TINDALL, JUSEPH RALPH SHOWERS. 

